JPS63182064A - Method and apparatus for washing plastic molded product - Google Patents
Method and apparatus for washing plastic molded productInfo
- Publication number
- JPS63182064A JPS63182064A JP1382387A JP1382387A JPS63182064A JP S63182064 A JPS63182064 A JP S63182064A JP 1382387 A JP1382387 A JP 1382387A JP 1382387 A JP1382387 A JP 1382387A JP S63182064 A JPS63182064 A JP S63182064A
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- washing solution
- cleaning liquid
- contamination
- plastic molded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005406 washing Methods 0.000 title abstract 13
- 239000007788 liquid Substances 0.000 claims abstract description 62
- 239000007921 spray Substances 0.000 claims abstract description 43
- 238000011109 contamination Methods 0.000 claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims description 88
- 239000012530 fluid Substances 0.000 claims description 12
- 238000010422 painting Methods 0.000 claims description 6
- 239000012459 cleaning agent Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims 1
- 239000000356 contaminant Substances 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000006082 mold release agent Substances 0.000 description 6
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、プラスチック成形品の塗装前に、その成形品
を水溶性洗浄剤で洗浄する方法とその装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for cleaning a plastic molded article with a water-soluble cleaning agent before painting the molded article.
（従来の技術）
従来から、プラスチック成形品の塗装前処理としての洗
浄には、塩素系溶剤による蒸気または浸漬あるいはスプ
レー洗浄方式が一般的に用いられている。しかし、近年
において、塩素系溶剤の人体への悪影響が明らかになっ
てきており、他の洗浄法への転換が検討され、すでに、
一部において採用されている。すなわち、その洗浄法と
しては１ｍまたはアルカリ系水溶し洗浄剤による方法が
主流となっている。このような水溶性洗浄剤による洗浄
工程は、たとえば、第２図に示すようになっている。第
２図において、■は洗浄液スプレー装置、２は王水スプ
レー装置、３は純水スプレー装置、４はエアブロ−装置
、５は水切り炉、６はオーバーヘッドコンベヤ、７はハ
ンガー、８は被処理物であるプラスチック成形品、９は
スプレー液圧送ポンプ、１０はスプレーノズル、１１は
スプレー水圧送ポンプ、１２はスプレーノズル５１３は
スプレー水圧送ポンプ、！４はスプレーノズル、１５は
エア圧送ファン、１６はエアプローノズル、１７．１８
．１９は液排出ポンプである。すなわち、プラスチック
成形品８は、ハンガー７によりオーバーヘッドコンベヤ
６に吊されて移動（第２図では右方に移動）シ、洗浄液
スプレー装置１では洗浄液で洗浄され、王水スプレー装
置２では王水で洗浄され、純水スプレー装置３では純水
で洗浄され、エアブロ−装Ｎ４ではエアブロ−され、水
切り炉５では水切りされる。ここで、前記各スプレー装
置１，２．３の更液は、１週間等の単位で、一定期間使
用後、それぞれの液排出ポンプ１７，１８．１９により
全量廃棄され、新しい液に替える方法が通常用いられて
いる。(Prior Art) Conventionally, steam, immersion, or spray cleaning methods using chlorinated solvents have generally been used to clean plastic molded products as a pre-painting treatment. However, in recent years, the negative effects of chlorinated solvents on the human body have become clear, and switching to other cleaning methods is being considered, and
It has been adopted in some areas. That is, the mainstream cleaning method is one using 1 m or an alkaline water-soluble cleaning agent. A cleaning process using such a water-soluble cleaning agent is shown in FIG. 2, for example. In Fig. 2, ■ is a cleaning liquid spray device, 2 is an aqua regia spray device, 3 is a pure water spray device, 4 is an air blow device, 5 is a draining furnace, 6 is an overhead conveyor, 7 is a hanger, and 8 is an object to be treated. A plastic molded product, 9 is a spray liquid pressure pump, 10 is a spray nozzle, 11 is a spray water pressure pump, 12 is a spray nozzle 513 is a spray water pressure pump, ! 4 is a spray nozzle, 15 is an air pressure fan, 16 is an air blower nozzle, 17.18
．． 19 is a liquid discharge pump. That is, the plastic molded product 8 is suspended from the overhead conveyor 6 by the hanger 7 and moved (moves to the right in FIG. 2), is cleaned with a cleaning liquid in the cleaning liquid spray device 1, and is sprayed with aqua regia in the aqua regia spray device 2. It is washed with pure water in the pure water spray device 3, air blown in the air blower N4, and drained in the water draining furnace 5. Here, after the liquid from each spray device 1, 2.3 is used for a certain period of time, such as one week, it is completely discarded by the respective liquid discharge pumps 17, 18, 19, and there is a method to replace it with a new liquid. Usually used.
（発明が解決しようとする問題点）
プラスチック成形品の塗装前の洗浄は、プラスチック成
形品の表面に付着している外部離型剤および内部離型剤
を取り去ることを主とするが、これらは成形条件の変動
によって付着している量が変わるため、洗浄によって落
とされて洗浄液中に混入する量も変動するという現象を
招く、一方、これらの離型剤が大量に洗浄液中に混入し
ていると、洗浄力の低下および新たにプラスチック成形
品にその洗浄液中の離型剤が付着してしまうという問題
点が発生し、塗装時のはじきや塗膜の付着性の低下をひ
きおこすことになる。したがって、第２図で説明した従
来の、洗浄液を一定期間で更液する方法では、上記の問
題点が発生するおそれがあり、更液周期を短くすること
で対応する場合は、必要以上の洗浄液を使用することに
なり、コストの増加を招くという問題点がある０本発明
は、このような問題点を解決することを目的とするもの
である。(Problems to be Solved by the Invention) Cleaning of plastic molded products before painting mainly involves removing external mold release agent and internal mold release agent adhering to the surface of the plastic molded product. As the amount of mold release agents that adhere to the mold changes depending on changes in molding conditions, the amount removed by cleaning and mixed into the cleaning solution also varies.On the other hand, large amounts of these mold release agents are mixed into the cleaning solution. This causes problems such as a decrease in cleaning power and the release agent in the cleaning solution adhering to the plastic molded product, which causes repellency during painting and a decrease in the adhesion of the paint film. Therefore, with the conventional method of changing the cleaning solution at fixed intervals as explained in Figure 2, there is a risk that the above problem will occur. The present invention is intended to solve these problems.
（問題点を解決するための手段）
洗浄液スプレー装置の洗浄液の汚染状態を常時計測し、
それが所定の汚染状態に達したところで、洗浄液スプレ
ー装置から一定量の洗浄液を自動的に排出させ、ついで
、一定量の新鮮な洗浄液を自動的に洗浄液スプレー装置
に供給するようにした。(Means to solve the problem) Constantly measure the contamination state of the cleaning liquid in the cleaning liquid spray equipment,
When it reaches a predetermined contamination condition, a certain amount of cleaning liquid is automatically drained from the cleaning liquid spraying device, and then a certain amount of fresh cleaning liquid is automatically supplied to the cleaning liquid spraying device.
（作 用）
洗浄液スプレー装置の洗浄液が所定の汚染状態に達した
時点で更液されるので、洗浄液の使用量が必要般小限と
なり、かつ、洗浄液の汚染度の過大による支障が全くな
くなる。(Function) Since the cleaning liquid in the cleaning liquid spray device is replaced when it reaches a predetermined level of contamination, the amount of cleaning liquid used is reduced to the necessary minimum, and there is no problem caused by excessive contamination of the cleaning liquid.
（実 施 例） 第１図は本発明の装置の一実施例を示している。(Example) FIG. 1 shows an embodiment of the apparatus of the invention.
第１図において、符号１から１９までは第２図の場合と
同様である。そして、２０は光透過方式による濁度計な
どの汚染度計測装置で、洗浄液スプレー装置ｌの洗浄液
の汚染状態を常時計測する。 ２１は後述する制御装置
、２２は新鮮洗浄液槽、２３は新鮮洗浄液供給ポンプで
ある。In FIG. 1, numerals 1 to 19 are the same as in FIG. 2. Reference numeral 20 denotes a contamination degree measuring device such as a turbidity meter using a light transmission method, which constantly measures the contamination state of the cleaning liquid in the cleaning liquid spray device l. 21 is a control device to be described later, 22 is a fresh cleaning liquid tank, and 23 is a fresh cleaning liquid supply pump.
第１図に示すように構成されたプラスチック成形品の洗
浄装置においては、プラスチック成形品８が各スプレー
装置１，２．３を順に経て洗浄されることなどについて
は、第２図で説明したのと同様であるが、洗浄液スプレ
ー装Ｍ１には、汚染度計測装置２０が設けられており、
該洗浄液スプレー装置１の洗浄液中に混入している汚染
物、つまり、プラスチック成形品８から除去′された外
部離型剤および内部離型剤または低分子未反応樹脂など
の物質の混入量を常時計測する。そして、連続洗浄処理
により、洗浄液中の汚染物質の混入量がある所定の量に
到達したことを、汚染度計測装置に連結された制御装５
１２１が検知すると、制御装置２１からの信号により、
液排出ポンプ１７が作動し、あらかじめ設定した一定量
の洗浄液を洗浄液スタレー装置ｌから外部に排出する。In the plastic molded product cleaning apparatus configured as shown in FIG. 1, the plastic molded product 8 is washed sequentially through each spray device 1, 2.3, etc., as explained in FIG. However, the cleaning liquid spray device M1 is provided with a contamination level measuring device 20,
The amount of contaminants mixed in the cleaning liquid of the cleaning liquid spray device 1, that is, the amount of substances such as external mold release agent and internal mold release agent removed from the plastic molded product 8, or low-molecular unreacted resin, is constantly checked. measure. A control device connected to the contamination level measuring device indicates that the amount of contaminants mixed in the cleaning liquid has reached a certain predetermined amount due to the continuous cleaning process.
121 detects, a signal from the control device 21 causes the
The liquid discharge pump 17 is activated to discharge a predetermined amount of cleaning liquid from the cleaning liquid starry device l to the outside.
ついで、制御装置２１からの信号により、新鮮洗浄液供
給ポンプ２３が作動し、前記排出した量と同量の新鮮な
洗浄液を新鮮洗浄液槽２２から洗浄液スプレー装置ｌに
供給する。このようにして、洗浄液スプレー装置ｌの洗
浄液が更液される。Next, the fresh cleaning liquid supply pump 23 is activated by a signal from the control device 21, and the same amount of fresh cleaning liquid as the discharged amount is supplied from the fresh cleaning liquid tank 22 to the cleaning liquid spray device l. In this way, the cleaning liquid in the cleaning liquid spray device 1 is replaced.
なお、王水スプレー装置２および純水スプレー装置３に
ついても、別個に、汚染度計測装置、制御装置、水槽、
水供給ポンプを設けて。In addition, the aqua regia spray device 2 and the pure water spray device 3 are also separately equipped with a contamination level measuring device, a control device, a water tank,
Install a water supply pump.
所定の汚染度に到達した時点で更水することができる。The water can be changed when a predetermined level of contamination is reached.
（発明の効果）
本発明のプラスチック成形品の洗浄方法は、洗浄液スプ
レー装置の洗浄液の汚染状態を常時計測して所定の汚染
状態に達した時点で、前記洗浄液スプレー装置から一定
量の洗浄液を自動的に排出し、こののち、新鮮な洗浄液
の一定量を前記洗浄液スプレー装置に自動的に供給する
方法であるから、洗浄液中の汚染物質の量を常に問題の
ないレベルに自動的に精度よく管理することができ、し
たがって、プラスチック成形品の表面の汚染物質の変動
に左右されることがなく、洗浄液の使用量を必要最小限
にしてコストダウンを図ることが可能となる。(Effects of the Invention) The method for cleaning plastic molded products of the present invention constantly measures the contamination state of the cleaning fluid in the cleaning fluid spray device, and when a predetermined level of contamination is reached, automatically sprays a certain amount of cleaning fluid from the cleaning fluid spray device. Since this method automatically supplies a certain amount of fresh cleaning solution to the cleaning solution spray device, the amount of contaminants in the cleaning solution can be automatically and precisely controlled to always be at a problem-free level. Therefore, it is not affected by fluctuations in contaminants on the surface of the plastic molded product, and it is possible to reduce costs by minimizing the amount of cleaning liquid used.
また本発明のプラスチック成形品の洗浄装置は、洗浄液
スプレー装置の洗浄液の汚染状態を常時計測する汚染度
計測装置を備えているから、前記洗浄液スプレー装置の
洗浄液を常時使用可能な範囲に管理することができ、か
つ、新鮮な洗浄液を前記洗浄液スプレー装置に供給する
新鮮洗浄液供給ポンプを備え、しかも、前記汚染度計測
装置で計測された計測値により、前記洗浄液スプレー装
置に付設された洗浄液排出ポンプおよび前記新鮮洗浄液
供給ポンプの作動を制御する制御装置を備えているから
、前記洗浄液スプレー装置の洗浄液が所定の汚染度にな
ったとき更液ができ、前記本発明の方法を確実に実施す
ることができる。Furthermore, since the apparatus for cleaning plastic molded products of the present invention is equipped with a contamination degree measuring device that constantly measures the contamination state of the cleaning liquid in the cleaning liquid spraying apparatus, it is possible to manage the cleaning liquid in the cleaning liquid spraying apparatus within a usable range at all times. and a fresh cleaning liquid supply pump that supplies fresh cleaning liquid to the cleaning liquid spray device, and a cleaning liquid discharge pump attached to the cleaning liquid spray device; Since the apparatus is equipped with a control device that controls the operation of the fresh cleaning liquid supply pump, when the cleaning liquid in the cleaning liquid spray device reaches a predetermined level of contamination, the cleaning liquid can be replaced, and the method of the present invention can be reliably carried out. can.
第１図は本発明の装置の一実施例を示した説明図、第２
図は従来の技術の一例を示した説明図である。
ｌ・・・洗浄゛液スプレー装置、８・・・プラスチック
成形品、９・・・スプレー液圧送ポンプ、１０・・・ス
プレーノズル、１７・・・液排出ポンプ、２０・・・汚
染度計測装置、 ２１・・・制御装置、２２・・・新鮮
洗浄液槽、２３・・・新鮮洗浄液供給ポンプ。
特許出願人 トヨタ自動車株式会社
牙１図
１θ −−スフ′し〆ノズ：しFIG. 1 is an explanatory diagram showing one embodiment of the device of the present invention, and FIG.
The figure is an explanatory diagram showing an example of a conventional technique. l...Cleaning liquid spray device, 8...Plastic molded product, 9...Spray liquid pressure pump, 10...Spray nozzle, 17...Liquid discharge pump, 20...Contamination degree measuring device , 21...Control device, 22...Fresh cleaning liquid tank, 23...Fresh cleaning liquid supply pump. Patent applicant: Toyota Motor Corporation
Claims (2)
洗浄装置において、洗浄液スプレー装置の洗浄液の汚染
状態を常時計測して所定の汚染状態に達した時点で、前
記洗浄液スプ レー装置から一定量の洗浄液を自動的に排出し、このの
ち、新鮮な洗浄液の一定量を前記洗浄液スプレー装置に
自動的に供給することを特徴とするプラスチック成形品
の洗浄方 法。(1) In a cleaning device using a water-soluble cleaning agent for plastic molded products before painting, the contamination state of the cleaning fluid in the cleaning fluid spray device is constantly measured, and when a predetermined level of contamination is reached, a certain amount of cleaning fluid is dispensed from the cleaning fluid spray device. A method for cleaning a plastic molded article, characterized in that the cleaning liquid is automatically discharged, and then a certain amount of fresh cleaning liquid is automatically supplied to the cleaning liquid spray device.
洗浄装置において、洗浄液スプレー装置の洗浄液の汚染
状態を常時計測する汚染度計測装置を備え、かつ、新鮮
な洗浄液を前記洗浄液スプレー装置に供給する新鮮洗浄
液供給ポンプを備え、しかも、前記汚染度計測装置で計
測された計測値により、前記洗浄液スプレー装置に付設
された洗浄液排出ポンプおよび前記新鮮洗浄液供給ポン
プの作動を制御する制御装置を備えていることを特徴と
するプラスチック成形品の洗浄装置。(2) A cleaning device using a water-soluble cleaning agent for plastic molded products before painting is equipped with a contamination degree measuring device that constantly measures the contamination state of the cleaning fluid in the cleaning fluid spray device, and supplies fresh cleaning fluid to the cleaning fluid spray device. It is equipped with a fresh cleaning liquid supply pump, and further includes a control device that controls the operation of the cleaning liquid discharge pump attached to the cleaning liquid spray device and the fresh cleaning liquid supply pump based on the measurement value measured by the contamination degree measuring device. A cleaning device for plastic molded products characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1382387A JPS63182064A (en) | 1987-01-23 | 1987-01-23 | Method and apparatus for washing plastic molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1382387A JPS63182064A (en) | 1987-01-23 | 1987-01-23 | Method and apparatus for washing plastic molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63182064A true JPS63182064A (en) | 1988-07-27 |
Family
ID=11843993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1382387A Pending JPS63182064A (en) | 1987-01-23 | 1987-01-23 | Method and apparatus for washing plastic molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63182064A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07256220A (en) * | 1995-03-20 | 1995-10-09 | Seiko Epson Corp | Cleaning device and cleaning |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154271A (en) * | 1984-08-27 | 1986-03-18 | 株式会社 クレオ | Washer |
| JPS61287471A (en) * | 1985-06-12 | 1986-12-17 | Nissan Motor Co Ltd | Process and device for controlling pretreatment of painting |
-
1987
- 1987-01-23 JP JP1382387A patent/JPS63182064A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154271A (en) * | 1984-08-27 | 1986-03-18 | 株式会社 クレオ | Washer |
| JPS61287471A (en) * | 1985-06-12 | 1986-12-17 | Nissan Motor Co Ltd | Process and device for controlling pretreatment of painting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07256220A (en) * | 1995-03-20 | 1995-10-09 | Seiko Epson Corp | Cleaning device and cleaning |
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